Permutation-padlock.



R; M. TAKIMOTO. PERMUTATI ON PADLOOK. APPLICATION FILED MAILQ, 1911.

1,052,627. Patented Feb. 11,1913.

2 SHEET8-SHEET 1.

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R. M. TAKIMOTO.

PERMUTATION PADLOCK. APPLIOATIDON FILED MAILQ, 1911.

Patented Feb. 11, 1913.

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ROY M. TAKIMOTG, OF SEATTLE, WASHINGTON.

YERMUTATION-PADLOCK.

To all whom it may concern:

Be it known that I, ROY M. TAKIMo'ro, a citizen of the United States, residing at Seattle, in the county of King, State of lVashington, have invented certain new and useful Improvements in Permutation-Padlocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates .to padlocks and more particularly to the class of permutation padlocks.

The primary object of the'invention is the provision of a padlock in which a key is operated in the usual manner for effecting the opening thereof, but preventing the said key from being manipulated by a person who is not familiar with the concealed portions of the padlock or'in other words cognizant of the combination controlling the unlocking thereof.

Another object of the invention is the provision of a padlock in which the bow or shackle is locked within the casing thereof by locking plate or bolt, the latter being-controlled by a combination mechanism which is changeable at will by the possessor of the padlock so that should the key for opening the same be accidentally lost, the finder will be unable to open thepadlock without being familiar with thecombination thereof that will perm'itthe said looking plate to be moved by-t'he key when the same is turned after, having been inserted within the casing of'the padlock.

further object of the invention is the provision of a padlock, preferably of the permutation type, in which it is unnecessary to take the same apart when it is desirerkto change or alter the combination that controls the opening of the padlock by a key in the ordinary manner, the padlock being capable of use without. utilizing the combin ion if desired, in a. like manner as the ordinary padlock. 7

With the above and other objects in' View, the invention consists in the construction, combination and arrangement of parts will be hereinafter more fully described, illustrated in the accompanying drawings, disclosing the preferred form of enihodiment of the invention and pointed outin the claims hereunto appended.

in the drawings :l. igure 1 is a front elespecification of Letters latent.

Application filed. March 9, 1911.

lzatented Feb. 111, 1913.

Serial No. 613,319.

vation of a padlock constructed in accordance with the invention. Fig. 2 is a similar view with the front plate of the casing re moved. Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 1, and looking in the direction indicated by the arrows. Fig. 4: is a sectional view taken on the line -i4- of Fig. 1, and looking in the direction indicated by the arrows. Fig. 5 is an inner face view of one of the hollow housings, to more particularly show its inner notched or toothed face. Fig. 6 is a sliding bolt or locking plate. 1,

Similar reference characters indicate. corresponding parts throughout the several views in the drawings.

Referring to the drawings by numerals, l0 designates generally the lock casing or shell comprising a front plate 11 having suitable rivet holes to receive the rivets 12 projecting laterally from a back or rear plate 13 and/between these plates is suitably fixed an edge spacer frame or curved plate 14 of the same contour as the said plates, one of the, rivets 12 serving as a pivot at one side of the casing for connecting one end of the bow 15 thereto. This bow isformed at its opposite end with a laterally extending, perforated lug 16 to be engaged by a locking plate or bolt as will be hereinafter more fully described.

Resting upon suitable guide pins 17, fixed transversely of the casing or shell is the locking plate or bolt 18, the same being formed at one edge with a tapered projecting bill 19 adapted to engage in the perforated lug 16 of the free. end of the bow 15 of the padlock when it is desired to securely fasten the bow in the casing. Pro jecting from the lower edge of the locking plate 18 intermediate its ends a depending: nose 20, the same being adaptedto be engaged by the bit of a. key (not shown} for the insertion in a suitable keyhole 21 in. the front plate 11 of the casing for the operation of the locking plate when it is desired to release the bow. Operative upon the locking plate l8 is a bowspring 22, the

latter being connected to the casing at its edge portion and contacting with the, lower edge of the plate removed from the bill 19 and serving to maintain the locking plate.

into the path ofanovement of the laterally projecting lug 1 3 of the bow to efiect the are tomatic locking of the latter when swung to a closed position.

plan view of the The opposite'or pivoted end of the bow 15 is provided with a suitable notch as shown in Fig.2 of .the drawings, to receive the free endof a curved spring 23, the oposite end of which is also fixed to the inner ace of the spacer frame 14 of the casing and this sprin serves to normally hold the bow in a close position.

Between the front late 11 and the adjacent face of the loc ing plate 18 within the casin 10 are mounted cylindrical housings 24, tie outermost of WhlCll are disposed below the central housin and each of said housings has a perforate outer end wall 25, the inner face of which is formed with a plurality of radially arranged teeth 26 and within these housings 24 are arranged coiled expansion springs 27 each having one end bearing agalnst one face of the locking plate 18 and its opposite end bearing against the inner face of the rotatable disk 28 formed with a central spindle or stem 29 directed toward the locking plate, the inner end of the spindle contacting with the adjacent face ofsaid locking plate. Each of these disks 28 is held against rotation within the housing 24 by means of a lug or nib 30,

the latter adapted to engage between adjacent teeth 26 of said housing so that the said disk on rotation thereof will simul taneously rotate the housing; The disks '28 are provided with outwardly extending tubular portions 31, -the latter projecting through suitable circular openings in the front plate 11 of the casing and each tubular portion 31 is provided with a notch 32.

- outer faces of which are provided with suitable indicia such as numerals or letters or both, designed to enable the owner of the padlock to set a desired combination that will enable the padlock to be opened only on the settin of the combination in a manner as will e hereinafter more fully de scribed.

Each of the housings 24 is provided with a notch 34 in its edge which contacts with the locking plate 18 and through these notches in said. housings are adapted to pass lugs or projections 35 extending outwardly from one face of the locking plate 18, said lugs being in the samerelative positions to each other as the housings.- The lugs 35 on the locking plate 18 are normally positioned outside of the housings 24 and when the notches 34 are moved into the path of movement of said lugs by rotation of the! housings, the locking plate may be moved to permit itsdisengagement with the laterally projecting lug 16 on the free end of the bow 15 and thereby permit the padlock to be opened. The housings 24 when turned to shift the notches 34 out of the path of movement of the lug 35 on the locking plate will hold the latter against movement,-.thus.

35 but on bringing the said counter-bores 36 into alinement with said stems or shifting the plate 18 to permit the stems to. em

gage in the counter bores, the said disks 28' can be moved against the tension of the. springs 27 thus permitting the nibs 30 to.

be disengaged from between adjacent teeth 26 at the interior of said' i housing, thereby permittin the said nibs to'be engaged between .di erent teeth and permitting the combination of a padlock to bechanged or altered as desired. It will be noted that the possessor of the lock to promote security, is capable of changing the combination-- thereof at will without the necessity of takingthe padlock apart in order to accomplish the same thereby rendering the 7 device extremely eflicient in use.

It is apparentthat the padlock cannot be opened without cognizance of the combination by a person getting possession of the padlock and key except the one having knowledge of the combination. Whenit is ,desired to open the look after thesame has been set to a certain combination so that the figures on the dials will register with 'a certain point upon the housingsor preferably the tubular extensions, the operator inserts a key within the said extensions and rotates the same and housings therewith to such points thereby positionin the notches 34 in ,the path of movement 0 the lugs 35 and by operation of the ke within the opening or-ke -hole 21 and to engagement of the bit of the key with the dependin nose 20, the said locking plate may befs ifted laterally to engage within the said notches and thus disengage the tapered bill 19 from the perforation in the lug 16.thereby freeing the bow. If the lock by its peculiar con-.

struction of mechanism is set in this manner 1. In a padlock a shell 9. bow pivoted at one end to the shell, a locking plate slidable in the shell, pins supporting said plate for such movement, means normally holding the said bow with its freeend disposed with- 5 table dlSkS 28 and said counter bores are positioned upon the same sides of the lugs" in the shell for engagement by one end of the locking plate, independent combination devices controlling the movements of the plate. and permitting the changing of the combination thereof exteriorly of the shell, said combination {devices being adapted to be operated by the key of the padlock and means carried by the shell and engaging the plate to hold it in a normally locked position.

2. A padlock comprising a casing having rear and front plates and an edge'spacer frame, a shackle having its end portions disposed within the casing, one end having a perforated lug, a locki plate slidably supported in the casing aiid adapted to engage in the perforation, a depending nose formed on the plate for engagement by the bit of a key to move the plate out of engagement with the lug, lugs projecting from one face of the plate adjacent to similarly positioned counter-bores therein, hollow cylindrical housings having notches adapted to be positioned inthe path of the lugs to permit the 2 said lugs to move through the notches and into the housing so as to permit disengagement of the plate by rotation of the key and tubular extensions mounted in the housings and projecting through the front plate to operate the housings and permit changing of the combination of the padlock.

3. A permutation padlock comprising a casing, a shackle carried by. the casing, a lockin plate supported Within the casing and a apted to engage the shackle to hold the latter in a locked position, said plate having a projection depending therefrom forv engagement by a key bit to disengage the plate from the shackle, a plurality of lugs projecting from the plate and disposed in longitudinal alinement with the adjacent recesses therein, hollow cylindrical members mounted within the casing in contactwith theplate and having notches adapted to be positioned in the path of, the lugs to permit the latter to be moved into and out of the same, said cylindrical members also having perforated end walls and provided with a series of notches upon their inner faces, tubular extensions movable in the housings "and projecting through the casing, said ex- "Lensions each having an enlarged portion provided with a lug to engage in the notches, guide pins carried by the p ate and slidably engaged by the extensions and coiled springs between the plates and extensions.

In testimony whereof, I affix my signature, in presence of two witnesses.

ROY M. TAKIMOTO.

Witnesses:

KOHN MESAKAM, GEo. A. URA. 

